Answer:
x = ± [tex]\sqrt{y-11}[/tex]
Step-by-step explanation:
Given
y = x² + 11 ( subtract 11 from both sides )
y - 11 = x² ( take the square root of both sides )
± [tex]\sqrt{y-11}[/tex] = [tex]\sqrt{x^2}[/tex], hence
x=square root of y-11 or x=-square root of y-11
96% sure
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